X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Fsys.c;h=a626116af5db96b58f47434eb47c6af23da6535e;hb=03a44825be987d720df854f63b2f7bd30e46bdde;hp=ed92e2f033422b8cde3601ada74be31633834ef8;hpb=acce292c82d4d82d35553b928df2b0597c3a9c78;p=safe%2Fjmp%2Flinux-2.6

diff --git a/kernel/sys.c b/kernel/sys.c
index ed92e2f..a626116 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -31,6 +31,8 @@
 #include <linux/cn_proc.h>
 #include <linux/getcpu.h>
 #include <linux/task_io_accounting_ops.h>
+#include <linux/seccomp.h>
+#include <linux/cpu.h>
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
@@ -99,535 +101,10 @@ struct pid *cad_pid;
 EXPORT_SYMBOL(cad_pid);
 
 /*
- *	Notifier list for kernel code which wants to be called
- *	at shutdown. This is used to stop any idling DMA operations
- *	and the like. 
+ * If set, this is used for preparing the system to power off.
  */
 
-static BLOCKING_NOTIFIER_HEAD(reboot_notifier_list);
-
-/*
- *	Notifier chain core routines.  The exported routines below
- *	are layered on top of these, with appropriate locking added.
- */
-
-static int notifier_chain_register(struct notifier_block **nl,
-		struct notifier_block *n)
-{
-	while ((*nl) != NULL) {
-		if (n->priority > (*nl)->priority)
-			break;
-		nl = &((*nl)->next);
-	}
-	n->next = *nl;
-	rcu_assign_pointer(*nl, n);
-	return 0;
-}
-
-static int notifier_chain_unregister(struct notifier_block **nl,
-		struct notifier_block *n)
-{
-	while ((*nl) != NULL) {
-		if ((*nl) == n) {
-			rcu_assign_pointer(*nl, n->next);
-			return 0;
-		}
-		nl = &((*nl)->next);
-	}
-	return -ENOENT;
-}
-
-/**
- * notifier_call_chain - Informs the registered notifiers about an event.
- *	@nl:		Pointer to head of the blocking notifier chain
- *	@val:		Value passed unmodified to notifier function
- *	@v:		Pointer passed unmodified to notifier function
- *	@nr_to_call:	Number of notifier functions to be called. Don't care
- *		     	value of this parameter is -1.
- *	@nr_calls:	Records the number of notifications sent. Don't care
- *		   	value of this field is NULL.
- * 	@returns:	notifier_call_chain returns the value returned by the
- *			last notifier function called.
- */
-
-static int __kprobes notifier_call_chain(struct notifier_block **nl,
-					unsigned long val, void *v,
-					int nr_to_call,	int *nr_calls)
-{
-	int ret = NOTIFY_DONE;
-	struct notifier_block *nb, *next_nb;
-
-	nb = rcu_dereference(*nl);
-
-	while (nb && nr_to_call) {
-		next_nb = rcu_dereference(nb->next);
-		ret = nb->notifier_call(nb, val, v);
-
-		if (nr_calls)
-			(*nr_calls)++;
-
-		if ((ret & NOTIFY_STOP_MASK) == NOTIFY_STOP_MASK)
-			break;
-		nb = next_nb;
-		nr_to_call--;
-	}
-	return ret;
-}
-
-/*
- *	Atomic notifier chain routines.  Registration and unregistration
- *	use a spinlock, and call_chain is synchronized by RCU (no locks).
- */
-
-/**
- *	atomic_notifier_chain_register - Add notifier to an atomic notifier chain
- *	@nh: Pointer to head of the atomic notifier chain
- *	@n: New entry in notifier chain
- *
- *	Adds a notifier to an atomic notifier chain.
- *
- *	Currently always returns zero.
- */
-
-int atomic_notifier_chain_register(struct atomic_notifier_head *nh,
-		struct notifier_block *n)
-{
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&nh->lock, flags);
-	ret = notifier_chain_register(&nh->head, n);
-	spin_unlock_irqrestore(&nh->lock, flags);
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(atomic_notifier_chain_register);
-
-/**
- *	atomic_notifier_chain_unregister - Remove notifier from an atomic notifier chain
- *	@nh: Pointer to head of the atomic notifier chain
- *	@n: Entry to remove from notifier chain
- *
- *	Removes a notifier from an atomic notifier chain.
- *
- *	Returns zero on success or %-ENOENT on failure.
- */
-int atomic_notifier_chain_unregister(struct atomic_notifier_head *nh,
-		struct notifier_block *n)
-{
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&nh->lock, flags);
-	ret = notifier_chain_unregister(&nh->head, n);
-	spin_unlock_irqrestore(&nh->lock, flags);
-	synchronize_rcu();
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
-
-/**
- *	__atomic_notifier_call_chain - Call functions in an atomic notifier chain
- *	@nh: Pointer to head of the atomic notifier chain
- *	@val: Value passed unmodified to notifier function
- *	@v: Pointer passed unmodified to notifier function
- *	@nr_to_call: See the comment for notifier_call_chain.
- *	@nr_calls: See the comment for notifier_call_chain.
- *
- *	Calls each function in a notifier chain in turn.  The functions
- *	run in an atomic context, so they must not block.
- *	This routine uses RCU to synchronize with changes to the chain.
- *
- *	If the return value of the notifier can be and'ed
- *	with %NOTIFY_STOP_MASK then atomic_notifier_call_chain()
- *	will return immediately, with the return value of
- *	the notifier function which halted execution.
- *	Otherwise the return value is the return value
- *	of the last notifier function called.
- */
- 
-int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
-					unsigned long val, void *v,
-					int nr_to_call, int *nr_calls)
-{
-	int ret;
-
-	rcu_read_lock();
-	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
-	rcu_read_unlock();
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(__atomic_notifier_call_chain);
-
-int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
-		unsigned long val, void *v)
-{
-	return __atomic_notifier_call_chain(nh, val, v, -1, NULL);
-}
-
-EXPORT_SYMBOL_GPL(atomic_notifier_call_chain);
-/*
- *	Blocking notifier chain routines.  All access to the chain is
- *	synchronized by an rwsem.
- */
-
-/**
- *	blocking_notifier_chain_register - Add notifier to a blocking notifier chain
- *	@nh: Pointer to head of the blocking notifier chain
- *	@n: New entry in notifier chain
- *
- *	Adds a notifier to a blocking notifier chain.
- *	Must be called in process context.
- *
- *	Currently always returns zero.
- */
- 
-int blocking_notifier_chain_register(struct blocking_notifier_head *nh,
-		struct notifier_block *n)
-{
-	int ret;
-
-	/*
-	 * This code gets used during boot-up, when task switching is
-	 * not yet working and interrupts must remain disabled.  At
-	 * such times we must not call down_write().
-	 */
-	if (unlikely(system_state == SYSTEM_BOOTING))
-		return notifier_chain_register(&nh->head, n);
-
-	down_write(&nh->rwsem);
-	ret = notifier_chain_register(&nh->head, n);
-	up_write(&nh->rwsem);
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(blocking_notifier_chain_register);
-
-/**
- *	blocking_notifier_chain_unregister - Remove notifier from a blocking notifier chain
- *	@nh: Pointer to head of the blocking notifier chain
- *	@n: Entry to remove from notifier chain
- *
- *	Removes a notifier from a blocking notifier chain.
- *	Must be called from process context.
- *
- *	Returns zero on success or %-ENOENT on failure.
- */
-int blocking_notifier_chain_unregister(struct blocking_notifier_head *nh,
-		struct notifier_block *n)
-{
-	int ret;
-
-	/*
-	 * This code gets used during boot-up, when task switching is
-	 * not yet working and interrupts must remain disabled.  At
-	 * such times we must not call down_write().
-	 */
-	if (unlikely(system_state == SYSTEM_BOOTING))
-		return notifier_chain_unregister(&nh->head, n);
-
-	down_write(&nh->rwsem);
-	ret = notifier_chain_unregister(&nh->head, n);
-	up_write(&nh->rwsem);
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(blocking_notifier_chain_unregister);
-
-/**
- *	__blocking_notifier_call_chain - Call functions in a blocking notifier chain
- *	@nh: Pointer to head of the blocking notifier chain
- *	@val: Value passed unmodified to notifier function
- *	@v: Pointer passed unmodified to notifier function
- *	@nr_to_call: See comment for notifier_call_chain.
- *	@nr_calls: See comment for notifier_call_chain.
- *
- *	Calls each function in a notifier chain in turn.  The functions
- *	run in a process context, so they are allowed to block.
- *
- *	If the return value of the notifier can be and'ed
- *	with %NOTIFY_STOP_MASK then blocking_notifier_call_chain()
- *	will return immediately, with the return value of
- *	the notifier function which halted execution.
- *	Otherwise the return value is the return value
- *	of the last notifier function called.
- */
- 
-int __blocking_notifier_call_chain(struct blocking_notifier_head *nh,
-				   unsigned long val, void *v,
-				   int nr_to_call, int *nr_calls)
-{
-	int ret = NOTIFY_DONE;
-
-	/*
-	 * We check the head outside the lock, but if this access is
-	 * racy then it does not matter what the result of the test
-	 * is, we re-check the list after having taken the lock anyway:
-	 */
-	if (rcu_dereference(nh->head)) {
-		down_read(&nh->rwsem);
-		ret = notifier_call_chain(&nh->head, val, v, nr_to_call,
-					nr_calls);
-		up_read(&nh->rwsem);
-	}
-	return ret;
-}
-EXPORT_SYMBOL_GPL(__blocking_notifier_call_chain);
-
-int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
-		unsigned long val, void *v)
-{
-	return __blocking_notifier_call_chain(nh, val, v, -1, NULL);
-}
-EXPORT_SYMBOL_GPL(blocking_notifier_call_chain);
-
-/*
- *	Raw notifier chain routines.  There is no protection;
- *	the caller must provide it.  Use at your own risk!
- */
-
-/**
- *	raw_notifier_chain_register - Add notifier to a raw notifier chain
- *	@nh: Pointer to head of the raw notifier chain
- *	@n: New entry in notifier chain
- *
- *	Adds a notifier to a raw notifier chain.
- *	All locking must be provided by the caller.
- *
- *	Currently always returns zero.
- */
-
-int raw_notifier_chain_register(struct raw_notifier_head *nh,
-		struct notifier_block *n)
-{
-	return notifier_chain_register(&nh->head, n);
-}
-
-EXPORT_SYMBOL_GPL(raw_notifier_chain_register);
-
-/**
- *	raw_notifier_chain_unregister - Remove notifier from a raw notifier chain
- *	@nh: Pointer to head of the raw notifier chain
- *	@n: Entry to remove from notifier chain
- *
- *	Removes a notifier from a raw notifier chain.
- *	All locking must be provided by the caller.
- *
- *	Returns zero on success or %-ENOENT on failure.
- */
-int raw_notifier_chain_unregister(struct raw_notifier_head *nh,
-		struct notifier_block *n)
-{
-	return notifier_chain_unregister(&nh->head, n);
-}
-
-EXPORT_SYMBOL_GPL(raw_notifier_chain_unregister);
-
-/**
- *	__raw_notifier_call_chain - Call functions in a raw notifier chain
- *	@nh: Pointer to head of the raw notifier chain
- *	@val: Value passed unmodified to notifier function
- *	@v: Pointer passed unmodified to notifier function
- *	@nr_to_call: See comment for notifier_call_chain.
- *	@nr_calls: See comment for notifier_call_chain
- *
- *	Calls each function in a notifier chain in turn.  The functions
- *	run in an undefined context.
- *	All locking must be provided by the caller.
- *
- *	If the return value of the notifier can be and'ed
- *	with %NOTIFY_STOP_MASK then raw_notifier_call_chain()
- *	will return immediately, with the return value of
- *	the notifier function which halted execution.
- *	Otherwise the return value is the return value
- *	of the last notifier function called.
- */
-
-int __raw_notifier_call_chain(struct raw_notifier_head *nh,
-			      unsigned long val, void *v,
-			      int nr_to_call, int *nr_calls)
-{
-	return notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
-}
-
-EXPORT_SYMBOL_GPL(__raw_notifier_call_chain);
-
-int raw_notifier_call_chain(struct raw_notifier_head *nh,
-		unsigned long val, void *v)
-{
-	return __raw_notifier_call_chain(nh, val, v, -1, NULL);
-}
-
-EXPORT_SYMBOL_GPL(raw_notifier_call_chain);
-
-/*
- *	SRCU notifier chain routines.    Registration and unregistration
- *	use a mutex, and call_chain is synchronized by SRCU (no locks).
- */
-
-/**
- *	srcu_notifier_chain_register - Add notifier to an SRCU notifier chain
- *	@nh: Pointer to head of the SRCU notifier chain
- *	@n: New entry in notifier chain
- *
- *	Adds a notifier to an SRCU notifier chain.
- *	Must be called in process context.
- *
- *	Currently always returns zero.
- */
-
-int srcu_notifier_chain_register(struct srcu_notifier_head *nh,
-		struct notifier_block *n)
-{
-	int ret;
-
-	/*
-	 * This code gets used during boot-up, when task switching is
-	 * not yet working and interrupts must remain disabled.  At
-	 * such times we must not call mutex_lock().
-	 */
-	if (unlikely(system_state == SYSTEM_BOOTING))
-		return notifier_chain_register(&nh->head, n);
-
-	mutex_lock(&nh->mutex);
-	ret = notifier_chain_register(&nh->head, n);
-	mutex_unlock(&nh->mutex);
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(srcu_notifier_chain_register);
-
-/**
- *	srcu_notifier_chain_unregister - Remove notifier from an SRCU notifier chain
- *	@nh: Pointer to head of the SRCU notifier chain
- *	@n: Entry to remove from notifier chain
- *
- *	Removes a notifier from an SRCU notifier chain.
- *	Must be called from process context.
- *
- *	Returns zero on success or %-ENOENT on failure.
- */
-int srcu_notifier_chain_unregister(struct srcu_notifier_head *nh,
-		struct notifier_block *n)
-{
-	int ret;
-
-	/*
-	 * This code gets used during boot-up, when task switching is
-	 * not yet working and interrupts must remain disabled.  At
-	 * such times we must not call mutex_lock().
-	 */
-	if (unlikely(system_state == SYSTEM_BOOTING))
-		return notifier_chain_unregister(&nh->head, n);
-
-	mutex_lock(&nh->mutex);
-	ret = notifier_chain_unregister(&nh->head, n);
-	mutex_unlock(&nh->mutex);
-	synchronize_srcu(&nh->srcu);
-	return ret;
-}
-
-EXPORT_SYMBOL_GPL(srcu_notifier_chain_unregister);
-
-/**
- *	__srcu_notifier_call_chain - Call functions in an SRCU notifier chain
- *	@nh: Pointer to head of the SRCU notifier chain
- *	@val: Value passed unmodified to notifier function
- *	@v: Pointer passed unmodified to notifier function
- *	@nr_to_call: See comment for notifier_call_chain.
- *	@nr_calls: See comment for notifier_call_chain
- *
- *	Calls each function in a notifier chain in turn.  The functions
- *	run in a process context, so they are allowed to block.
- *
- *	If the return value of the notifier can be and'ed
- *	with %NOTIFY_STOP_MASK then srcu_notifier_call_chain()
- *	will return immediately, with the return value of
- *	the notifier function which halted execution.
- *	Otherwise the return value is the return value
- *	of the last notifier function called.
- */
-
-int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
-			       unsigned long val, void *v,
-			       int nr_to_call, int *nr_calls)
-{
-	int ret;
-	int idx;
-
-	idx = srcu_read_lock(&nh->srcu);
-	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
-	srcu_read_unlock(&nh->srcu, idx);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(__srcu_notifier_call_chain);
-
-int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
-		unsigned long val, void *v)
-{
-	return __srcu_notifier_call_chain(nh, val, v, -1, NULL);
-}
-EXPORT_SYMBOL_GPL(srcu_notifier_call_chain);
-
-/**
- *	srcu_init_notifier_head - Initialize an SRCU notifier head
- *	@nh: Pointer to head of the srcu notifier chain
- *
- *	Unlike other sorts of notifier heads, SRCU notifier heads require
- *	dynamic initialization.  Be sure to call this routine before
- *	calling any of the other SRCU notifier routines for this head.
- *
- *	If an SRCU notifier head is deallocated, it must first be cleaned
- *	up by calling srcu_cleanup_notifier_head().  Otherwise the head's
- *	per-cpu data (used by the SRCU mechanism) will leak.
- */
-
-void srcu_init_notifier_head(struct srcu_notifier_head *nh)
-{
-	mutex_init(&nh->mutex);
-	if (init_srcu_struct(&nh->srcu) < 0)
-		BUG();
-	nh->head = NULL;
-}
-
-EXPORT_SYMBOL_GPL(srcu_init_notifier_head);
-
-/**
- *	register_reboot_notifier - Register function to be called at reboot time
- *	@nb: Info about notifier function to be called
- *
- *	Registers a function with the list of functions
- *	to be called at reboot time.
- *
- *	Currently always returns zero, as blocking_notifier_chain_register()
- *	always returns zero.
- */
- 
-int register_reboot_notifier(struct notifier_block * nb)
-{
-	return blocking_notifier_chain_register(&reboot_notifier_list, nb);
-}
-
-EXPORT_SYMBOL(register_reboot_notifier);
-
-/**
- *	unregister_reboot_notifier - Unregister previously registered reboot notifier
- *	@nb: Hook to be unregistered
- *
- *	Unregisters a previously registered reboot
- *	notifier function.
- *
- *	Returns zero on success, or %-ENOENT on failure.
- */
- 
-int unregister_reboot_notifier(struct notifier_block * nb)
-{
-	return blocking_notifier_chain_unregister(&reboot_notifier_list, nb);
-}
-
-EXPORT_SYMBOL(unregister_reboot_notifier);
+void (*pm_power_off_prepare)(void);
 
 static int set_one_prio(struct task_struct *p, int niceval, int error)
 {
@@ -675,7 +152,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
 	switch (which) {
 		case PRIO_PROCESS:
 			if (who)
-				p = find_task_by_pid(who);
+				p = find_task_by_vpid(who);
 			else
 				p = current;
 			if (p)
@@ -683,7 +160,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
 			break;
 		case PRIO_PGRP:
 			if (who)
-				pgrp = find_pid(who);
+				pgrp = find_vpid(who);
 			else
 				pgrp = task_pgrp(current);
 			do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
@@ -732,7 +209,7 @@ asmlinkage long sys_getpriority(int which, int who)
 	switch (which) {
 		case PRIO_PROCESS:
 			if (who)
-				p = find_task_by_pid(who);
+				p = find_task_by_vpid(who);
 			else
 				p = current;
 			if (p) {
@@ -743,7 +220,7 @@ asmlinkage long sys_getpriority(int which, int who)
 			break;
 		case PRIO_PGRP:
 			if (who)
-				pgrp = find_pid(who);
+				pgrp = find_vpid(who);
 			else
 				pgrp = task_pgrp(current);
 			do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
@@ -796,6 +273,7 @@ static void kernel_restart_prepare(char *cmd)
 	blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
 	system_state = SYSTEM_RESTART;
 	device_shutdown();
+	sysdev_shutdown();
 }
 
 /**
@@ -837,7 +315,7 @@ static void kernel_kexec(void)
 #endif
 }
 
-void kernel_shutdown_prepare(enum system_states state)
+static void kernel_shutdown_prepare(enum system_states state)
 {
 	blocking_notifier_call_chain(&reboot_notifier_list,
 		(state == SYSTEM_HALT)?SYS_HALT:SYS_POWER_OFF, NULL);
@@ -852,6 +330,7 @@ void kernel_shutdown_prepare(enum system_states state)
 void kernel_halt(void)
 {
 	kernel_shutdown_prepare(SYSTEM_HALT);
+	sysdev_shutdown();
 	printk(KERN_EMERG "System halted.\n");
 	machine_halt();
 }
@@ -866,6 +345,10 @@ EXPORT_SYMBOL_GPL(kernel_halt);
 void kernel_power_off(void)
 {
 	kernel_shutdown_prepare(SYSTEM_POWER_OFF);
+	if (pm_power_off_prepare)
+		pm_power_off_prepare();
+	disable_nonboot_cpus();
+	sysdev_shutdown();
 	printk(KERN_EMERG "Power down.\n");
 	machine_power_off();
 }
@@ -941,7 +424,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 		unlock_kernel();
 		return -EINVAL;
 
-#ifdef CONFIG_SOFTWARE_SUSPEND
+#ifdef CONFIG_HIBERNATION
 	case LINUX_REBOOT_CMD_SW_SUSPEND:
 		{
 			int ret = hibernate();
@@ -1026,7 +509,7 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
 			return -EPERM;
 	}
 	if (new_egid != old_egid) {
-		current->mm->dumpable = suid_dumpable;
+		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
 	if (rgid != (gid_t) -1 ||
@@ -1056,13 +539,13 @@ asmlinkage long sys_setgid(gid_t gid)
 
 	if (capable(CAP_SETGID)) {
 		if (old_egid != gid) {
-			current->mm->dumpable = suid_dumpable;
+			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
 		current->gid = current->egid = current->sgid = current->fsgid = gid;
 	} else if ((gid == current->gid) || (gid == current->sgid)) {
 		if (old_egid != gid) {
-			current->mm->dumpable = suid_dumpable;
+			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
 		current->egid = current->fsgid = gid;
@@ -1093,7 +576,7 @@ static int set_user(uid_t new_ruid, int dumpclear)
 	switch_uid(new_user);
 
 	if (dumpclear) {
-		current->mm->dumpable = suid_dumpable;
+		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
 	current->uid = new_ruid;
@@ -1149,7 +632,7 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
 		return -EAGAIN;
 
 	if (new_euid != old_euid) {
-		current->mm->dumpable = suid_dumpable;
+		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
 	current->fsuid = current->euid = new_euid;
@@ -1199,7 +682,7 @@ asmlinkage long sys_setuid(uid_t uid)
 		return -EPERM;
 
 	if (old_euid != uid) {
-		current->mm->dumpable = suid_dumpable;
+		set_dumpable(current->mm, suid_dumpable);
 		smp_wmb();
 	}
 	current->fsuid = current->euid = uid;
@@ -1244,7 +727,7 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
 	}
 	if (euid != (uid_t) -1) {
 		if (euid != current->euid) {
-			current->mm->dumpable = suid_dumpable;
+			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
 		current->euid = euid;
@@ -1294,7 +777,7 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
 	}
 	if (egid != (gid_t) -1) {
 		if (egid != current->egid) {
-			current->mm->dumpable = suid_dumpable;
+			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
 		current->egid = egid;
@@ -1340,7 +823,7 @@ asmlinkage long sys_setfsuid(uid_t uid)
 	    uid == current->suid || uid == current->fsuid || 
 	    capable(CAP_SETUID)) {
 		if (uid != old_fsuid) {
-			current->mm->dumpable = suid_dumpable;
+			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
 		current->fsuid = uid;
@@ -1369,7 +852,7 @@ asmlinkage long sys_setfsgid(gid_t gid)
 	    gid == current->sgid || gid == current->fsgid || 
 	    capable(CAP_SETGID)) {
 		if (gid != old_fsgid) {
-			current->mm->dumpable = suid_dumpable;
+			set_dumpable(current->mm, suid_dumpable);
 			smp_wmb();
 		}
 		current->fsgid = gid;
@@ -1429,15 +912,15 @@ asmlinkage long sys_times(struct tms __user * tbuf)
  * Auch. Had to add the 'did_exec' flag to conform completely to POSIX.
  * LBT 04.03.94
  */
-
 asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 {
 	struct task_struct *p;
 	struct task_struct *group_leader = current->group_leader;
-	int err = -EINVAL;
+	struct pid *pgrp;
+	int err;
 
 	if (!pid)
-		pid = group_leader->pid;
+		pid = task_pid_vnr(group_leader);
 	if (!pgid)
 		pgid = pid;
 	if (pgid < 0)
@@ -1449,7 +932,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 	write_lock_irq(&tasklist_lock);
 
 	err = -ESRCH;
-	p = find_task_by_pid(pid);
+	p = find_task_by_vpid(pid);
 	if (!p)
 		goto out;
 
@@ -1457,7 +940,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 	if (!thread_group_leader(p))
 		goto out;
 
-	if (p->real_parent == group_leader) {
+	if (same_thread_group(p->real_parent, group_leader)) {
 		err = -EPERM;
 		if (task_session(p) != task_session(group_leader))
 			goto out;
@@ -1474,10 +957,12 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 	if (p->signal->leader)
 		goto out;
 
+	pgrp = task_pid(p);
 	if (pgid != pid) {
-		struct task_struct *g =
-			find_task_by_pid_type(PIDTYPE_PGID, pgid);
+		struct task_struct *g;
 
+		pgrp = find_vpid(pgid);
+		g = pid_task(pgrp, PIDTYPE_PGID);
 		if (!g || task_session(g) != task_session(group_leader))
 			goto out;
 	}
@@ -1486,10 +971,10 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 	if (err)
 		goto out;
 
-	if (process_group(p) != pgid) {
+	if (task_pgrp(p) != pgrp) {
 		detach_pid(p, PIDTYPE_PGID);
-		p->signal->pgrp = pgid;
-		attach_pid(p, PIDTYPE_PGID, find_pid(pgid));
+		attach_pid(p, PIDTYPE_PGID, pgrp);
+		set_task_pgrp(p, pid_nr(pgrp));
 	}
 
 	err = 0;
@@ -1502,19 +987,18 @@ out:
 asmlinkage long sys_getpgid(pid_t pid)
 {
 	if (!pid)
-		return process_group(current);
+		return task_pgrp_vnr(current);
 	else {
 		int retval;
 		struct task_struct *p;
 
 		read_lock(&tasklist_lock);
-		p = find_task_by_pid(pid);
-
+		p = find_task_by_vpid(pid);
 		retval = -ESRCH;
 		if (p) {
 			retval = security_task_getpgid(p);
 			if (!retval)
-				retval = process_group(p);
+				retval = task_pgrp_vnr(p);
 		}
 		read_unlock(&tasklist_lock);
 		return retval;
@@ -1526,7 +1010,7 @@ asmlinkage long sys_getpgid(pid_t pid)
 asmlinkage long sys_getpgrp(void)
 {
 	/* SMP - assuming writes are word atomic this is fine */
-	return process_group(current);
+	return task_pgrp_vnr(current);
 }
 
 #endif
@@ -1534,21 +1018,20 @@ asmlinkage long sys_getpgrp(void)
 asmlinkage long sys_getsid(pid_t pid)
 {
 	if (!pid)
-		return process_session(current);
+		return task_session_vnr(current);
 	else {
 		int retval;
 		struct task_struct *p;
 
-		read_lock(&tasklist_lock);
-		p = find_task_by_pid(pid);
-
+		rcu_read_lock();
+		p = find_task_by_vpid(pid);
 		retval = -ESRCH;
 		if (p) {
 			retval = security_task_getsid(p);
 			if (!retval)
-				retval = process_session(p);
+				retval = task_session_vnr(p);
 		}
-		read_unlock(&tasklist_lock);
+		rcu_read_unlock();
 		return retval;
 	}
 }
@@ -1556,34 +1039,29 @@ asmlinkage long sys_getsid(pid_t pid)
 asmlinkage long sys_setsid(void)
 {
 	struct task_struct *group_leader = current->group_leader;
-	pid_t session;
+	struct pid *sid = task_pid(group_leader);
+	pid_t session = pid_vnr(sid);
 	int err = -EPERM;
 
 	write_lock_irq(&tasklist_lock);
-
 	/* Fail if I am already a session leader */
 	if (group_leader->signal->leader)
 		goto out;
 
-	session = group_leader->pid;
 	/* Fail if a process group id already exists that equals the
 	 * proposed session id.
-	 *
-	 * Don't check if session id == 1 because kernel threads use this
-	 * session id and so the check will always fail and make it so
-	 * init cannot successfully call setsid.
 	 */
-	if (session > 1 && find_task_by_pid_type(PIDTYPE_PGID, session))
+	if (pid_task(sid, PIDTYPE_PGID))
 		goto out;
 
 	group_leader->signal->leader = 1;
-	__set_special_pids(session, session);
+	__set_special_pids(sid);
 
 	spin_lock(&group_leader->sighand->siglock);
 	group_leader->signal->tty = NULL;
 	spin_unlock(&group_leader->sighand->siglock);
 
-	err = process_group(group_leader);
+	err = session;
 out:
 	write_unlock_irq(&tasklist_lock);
 	return err;
@@ -1652,16 +1130,16 @@ static int groups_to_user(gid_t __user *grouplist,
     struct group_info *group_info)
 {
 	int i;
-	int count = group_info->ngroups;
+	unsigned int count = group_info->ngroups;
 
 	for (i = 0; i < group_info->nblocks; i++) {
-		int cp_count = min(NGROUPS_PER_BLOCK, count);
-		int off = i * NGROUPS_PER_BLOCK;
-		int len = cp_count * sizeof(*grouplist);
+		unsigned int cp_count = min(NGROUPS_PER_BLOCK, count);
+		unsigned int len = cp_count * sizeof(*grouplist);
 
-		if (copy_to_user(grouplist+off, group_info->blocks[i], len))
+		if (copy_to_user(grouplist, group_info->blocks[i], len))
 			return -EFAULT;
 
+		grouplist += NGROUPS_PER_BLOCK;
 		count -= cp_count;
 	}
 	return 0;
@@ -1672,16 +1150,16 @@ static int groups_from_user(struct group_info *group_info,
     gid_t __user *grouplist)
 {
 	int i;
-	int count = group_info->ngroups;
+	unsigned int count = group_info->ngroups;
 
 	for (i = 0; i < group_info->nblocks; i++) {
-		int cp_count = min(NGROUPS_PER_BLOCK, count);
-		int off = i * NGROUPS_PER_BLOCK;
-		int len = cp_count * sizeof(*grouplist);
+		unsigned int cp_count = min(NGROUPS_PER_BLOCK, count);
+		unsigned int len = cp_count * sizeof(*grouplist);
 
-		if (copy_from_user(group_info->blocks[i], grouplist+off, len))
+		if (copy_from_user(group_info->blocks[i], grouplist, len))
 			return -EFAULT;
 
+		grouplist += NGROUPS_PER_BLOCK;
 		count -= cp_count;
 	}
 	return 0;
@@ -1979,7 +1457,7 @@ asmlinkage long sys_setrlimit(unsigned int resource, struct rlimit __user *rlim)
 	if ((new_rlim.rlim_max > old_rlim->rlim_max) &&
 	    !capable(CAP_SYS_RESOURCE))
 		return -EPERM;
-	if (resource == RLIMIT_NOFILE && new_rlim.rlim_max > NR_OPEN)
+	if (resource == RLIMIT_NOFILE && new_rlim.rlim_max > sysctl_nr_open)
 		return -EPERM;
 
 	retval = security_task_setrlimit(resource, &new_rlim);
@@ -2144,7 +1622,7 @@ asmlinkage long sys_umask(int mask)
 	mask = xchg(&current->fs->umask, mask & S_IRWXUGO);
 	return mask;
 }
-    
+
 asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 			  unsigned long arg4, unsigned long arg5)
 {
@@ -2166,14 +1644,14 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 			error = put_user(current->pdeath_signal, (int __user *)arg2);
 			break;
 		case PR_GET_DUMPABLE:
-			error = current->mm->dumpable;
+			error = get_dumpable(current->mm);
 			break;
 		case PR_SET_DUMPABLE:
 			if (arg2 < 0 || arg2 > 1) {
 				error = -EINVAL;
 				break;
 			}
-			current->mm->dumpable = arg2;
+			set_dumpable(current->mm, arg2);
 			break;
 
 		case PR_SET_UNALIGN:
@@ -2242,6 +1720,24 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 			error = SET_ENDIAN(current, arg2);
 			break;
 
+		case PR_GET_SECCOMP:
+			error = prctl_get_seccomp();
+			break;
+		case PR_SET_SECCOMP:
+			error = prctl_set_seccomp(arg2);
+			break;
+
+		case PR_CAPBSET_READ:
+			if (!cap_valid(arg2))
+				return -EINVAL;
+			return !!cap_raised(current->cap_bset, arg2);
+		case PR_CAPBSET_DROP:
+#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
+			return cap_prctl_drop(arg2);
+#else
+			return -EINVAL;
+#endif
+
 		default:
 			error = -EINVAL;
 			break;
@@ -2250,7 +1746,7 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
 }
 
 asmlinkage long sys_getcpu(unsigned __user *cpup, unsigned __user *nodep,
-	   		   struct getcpu_cache __user *cache)
+			   struct getcpu_cache __user *unused)
 {
 	int err = 0;
 	int cpu = raw_smp_processor_id();
@@ -2258,23 +1754,63 @@ asmlinkage long sys_getcpu(unsigned __user *cpup, unsigned __user *nodep,
 		err |= put_user(cpu, cpup);
 	if (nodep)
 		err |= put_user(cpu_to_node(cpu), nodep);
-	if (cache) {
-		/*
-		 * The cache is not needed for this implementation,
-		 * but make sure user programs pass something
-		 * valid. vsyscall implementations can instead make
-		 * good use of the cache. Only use t0 and t1 because
-		 * these are available in both 32bit and 64bit ABI (no
-		 * need for a compat_getcpu). 32bit has enough
-		 * padding
-		 */
-		unsigned long t0, t1;
-		get_user(t0, &cache->blob[0]);
-		get_user(t1, &cache->blob[1]);
-		t0++;
-		t1++;
-		put_user(t0, &cache->blob[0]);
-		put_user(t1, &cache->blob[1]);
-	}
 	return err ? -EFAULT : 0;
 }
+
+char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
+
+static void argv_cleanup(char **argv, char **envp)
+{
+	argv_free(argv);
+}
+
+/**
+ * orderly_poweroff - Trigger an orderly system poweroff
+ * @force: force poweroff if command execution fails
+ *
+ * This may be called from any context to trigger a system shutdown.
+ * If the orderly shutdown fails, it will force an immediate shutdown.
+ */
+int orderly_poweroff(bool force)
+{
+	int argc;
+	char **argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
+	static char *envp[] = {
+		"HOME=/",
+		"PATH=/sbin:/bin:/usr/sbin:/usr/bin",
+		NULL
+	};
+	int ret = -ENOMEM;
+	struct subprocess_info *info;
+
+	if (argv == NULL) {
+		printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
+		       __func__, poweroff_cmd);
+		goto out;
+	}
+
+	info = call_usermodehelper_setup(argv[0], argv, envp);
+	if (info == NULL) {
+		argv_free(argv);
+		goto out;
+	}
+
+	call_usermodehelper_setcleanup(info, argv_cleanup);
+
+	ret = call_usermodehelper_exec(info, UMH_NO_WAIT);
+
+  out:
+	if (ret && force) {
+		printk(KERN_WARNING "Failed to start orderly shutdown: "
+		       "forcing the issue\n");
+
+		/* I guess this should try to kick off some daemon to
+		   sync and poweroff asap.  Or not even bother syncing
+		   if we're doing an emergency shutdown? */
+		emergency_sync();
+		kernel_power_off();
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(orderly_poweroff);